Door-operating mechanism.



C. ALBRECHT. Jn.

DOOR OPERATING MECHANISM.

APPLlcAUoN man 1uLY1a,1917.

1,257,1'72- Patented. 11eb.19,1918.

2 SHEETS-SHEET l.

ATTORNEY C. ALBRECHT.I Jn.

DOOR OPERATING MECHANISM.

APPLICATION FILED IULY 18,1917. Ew., man 1191.111918.

2 SHEETS-SHEET 2.

l BY

1 -y 1 l/"x, l'. f f Oy M ATToRNEY INVENTOR 2 es A ZWechJ:

DOOR-OPERATING MECHAN ISM.

Specification of Letters Patent.

Patented Feb. 19, 1918.-

Appllcation led July 18, 1917. Serial No. 181,388.

To aZZ wkom z't may concern.' A

Be it known that I, CHARLES ALBRECHT, J r. a citizen of the UnitedStates, residing at Schleisingerville, in the county of fashington andState of Wisconsin, have invented new and and useful Improvements in-Door-Operating Mechanism, of which the following is a specification. g

My invention relates to door operating mechanism and has for its primaryobject to provide a door operating mechanism which is adapted to beactuated to open the door upon the depression of a `platform located inthe roadway adjacent the door.

A further object of my invention is to provide-a door opening mechanism,the initial operation of which serves to retract the latches of thedoor.

With these and other objects in view which will be hereinafter fullydescribed and particularly pointed out in the claims, the inventionconsists in the novel construction and arrangement of parts illustratedin the accompanying drawings forming a part of this specification, inwhichz p Figure 1 is a top plan view of a door operating mechanismembodying my invention,

Fig. 2 is a vertical section in side elevation vof the same,

Fig. 3 is an enlarged top plan view of the pinion and se carrying theOor,

Fig. 4 is anenlarged fronty elevation of the same.

Like characters of reference indicate like parts in the various views. i

In the drawings l designates a door frame upon 'the respective sides ofwhich avpair of doors 2 and 3 are mounted for swinging movement by meansof hinges 4. The doorV 3 is equipped with spring latches 5 at the upperand lower ends thereof which engage the lintel and the threshold of thedoor frame respectively to lock the same in closed osition against thejamb 6 of the door rame. 'I he door 3 is provided with an overg lappingstrip 7 which extends over the ad- ]acent edge of the door 2, when thedoors are closed, and serves to hold the door 2 against the jamb 6. Acable 8 is provided for each door and one end of each cable 8 is securedto its respective door near the free end thereof, the length of eachcable being trained over a respective pulle 9 mounted yupon the lintelof the door. he cables are then trained over respective pulleys 10mounted ent mechanism of the latch v on respective sides `of the door,and have weights 11 secured to their other ends which serve to normallyretain the doors in closed position.

Mounted on each door near its upper end thereof is a bracket 12 uponwhich is mounted a pinion 13 disposed in axial alinement with respectivehinges 4. -A second bracket 14 is mounted upon each side member of thedoor frame 1 adjacent the respective bracket 12 and a segment gear 15 ispivotally mounted thereon and adapted t-o mesh with the respectivepinion 13, each segment having an arm 16 extending laterally therefrom.

A longitudinal recess 17 is formed in the roadway leading through thedoor and extending on either side thereof, said recess being disposed inthe path of the wheels of a vehicle passin through said door. A rockshaft 18 exten s across the roadway just below the door and is mountedfor pivotal movement in bearings 19 mounted. on the threshold of thedoor frame. Said rock shaft has a crank 20 formed thereon and 1ying inthe recess 17, for purposes hereinafter described, and has arms 21extending upwardly at either end thereof just in front of the respectiveside members of the door 1. The brackets 14 have arms 22 formed there- 4on and extending outwardly in front ofthe respective arms 16 of thesegment gears 15, pulleys 23 being mounted upon the outer ends of therespective arms 22 upon horizontal axes. Cables 2-t-are trained overrespective pulleys 23 and have their upper ends secured to the free endof respective arms 16 of 'segment gears 1.5. The lower` portions of saidcables 24 are trained over respective pulleys 25 andhave their lowerends connected to respective hooks 26, said hooks en-y gaging the holesin the ends of respective arms 21 of the rock shaft 18. It will be notedat this point that when the rock shaft 18 is pivoted tomove the 'arms 21thereof away from respective side members of the door frame the cables24 pull the arms 16 of the segment gears 15 outwardly, and the segmentgears move the pinions 13 to open the doors 2 and 3.

Mounted within the recess 17 at either end thereof is a verticalstandard 27, and cams 28 are mounted thereon for vertical slidingmovement by means of pairs of studs 29, secured to respective camsengaging respective vertical slots 30 of the standards. A lateralprojection is formed on each standard 27 and yhave studs 32 extendingupwardly therefrom.' A coiled compression spring 33 encircles each studand abuts the respective projection 31 with its lower end and anoverlying portion of the respective cam 28 whereby each cam is normallyretained in its upper position. A platform 34 is mounted for verticalmovement in the recess 17 and has its respective ends secured to thecams 28, the upper surface of said platform lying slightly above thesurface of the roadway when said cams are in normal position. A plate 35is hinged to either end of the platform 34 and have. the free endsthereof resting upon the roadway whereby a vehicle Wheel wi easily rollupon the platform 34. A lever 36 has its lower end pivotally mountedupon the respective standard 27 and has a cam surface 37 formed thereonwhich is l adapted to be engaged by the respective cam 28, and the upperend of each lever 36` nectingrod 38, the opposite end of eachconnectingrod being pivotally, mounted upon the crank 20 of the rockshaft. When a vehicle wheel rolls upon the platform 34, the weightthereof depresses the platform 34 and the adjacent cam y28, the movementof the cam being transmitted to the respective, lever 36 j. through thecam surface 37 thereof, and the rock shaft 18 is operated through themedium-of the respective connecting rod 38 to open the doors, ashereinbefore described. It will be noted at this point that as thevehicle wheel moves along the platform 34 and reaches the center thereofboth cams are depressed, and as the wheel moves toward the farther endthe cam which was first depressed rises, the other cam being nowdepressed holding the door open as before. When the vehicle wheel passesolf` o f the platform both cams return to normal position and the doorsare allowed to close under the influence of the weights 11.

The segment gear 15 of the door 3 has an upwardly facing cam -39 formedthereon, and the bracket 12 of said door 3 has an arm 40 extendingoutwardly therefrom upon which is pivotally mounted a lever 41, theouter end of which is adapted to be engaged by said cam 39. Cables 42are connected to. respective latches 5 and are trained over pulleys 43mounted upon the door 3, the

l other ends of said'cable being connected to the other arm of the lever41. The cam 39 is 'so disposed upon the segment gear l15 that upon theinitial opening movement of said segment gear the lever 41 is actuatedto retract the latch 5 from engagement with the lintel and. threshold ofthe door frame, as -hereinbefore described, to allow the door tobeopened. The teethy of this segment gear `15 are so dlsposed yrelativeto `the respective pinion 13 that when the door 3 is closed the lasttooth. of the segment gear has. passedA It is during this final move-`actuates the lever 41 to operate the latches 5, and as a result, thelatches 5 are operated when the door 3 is at rest in its closedposition'whereby the latches may be operated Without interference by theopening or closing movement'of the door.

The teeth lof thesegment 15 which-engages the pinion 13 of the door 2 donot disengage from the pinion when the door 2 is closed, and the closingmovement of the doors 2 and 3 are so timed relative to each other thatthe door 2 closes slightly in advance of the door 3 whereby the strip 7j does not interfere with the closing thereof. In order that the doorsmay always be adI justed properly relative to each other the arms 21 ofthe rock shaft are adjustable, each arm comprising two members, a lowermember which is secured upon the respective end of the rock shaft, andan upper member 44 which is screw threaded upon the free end of thelower member, a nut 45 being threaded upon each lower member and adaptedto be clamped against the adjacent end of the respective upper member tosecure the same in any position.

Having thus fully described my'invention, I claim:

1. In a device of the 'character described, the combination with' a doorframe, of a door hingedly mounted therein, a pinion mounted on saiddoor, latches on said ldoor adapted to engagev said door frame when thedoor is shut, a segment gear mounted for pivotal movement on said doorframe and adapted to mesh with said pinion, the disposition of saidvsegment being such that when the door is closed the teeth of said gearare out of engagement with said pinion, a cam on said segment gear, alever mounted on said door and having one end thereof engaging said camand having the other end thereof in operable relation with said latcheswhereby said latches are retracted upon the initial opening movement ofsaidsegment, and means for operating said segment.

2. In a device of the' character described, the combination with a doorframe, of a pair ofA doors hingedly mounted therein, a pinion mounted oneach door, latches on one of said doors, an overla ping strip on saidlatch carrying door a apted to engage the other door to hold it shut, asegment gear mounted for pivotal movement on each of said door framesand adapted to mesh with respective pinions, the disposition of saidsegment of the latch carrying door being such that when the door hasclosed the teeth of said segment are out of engagement with said pinion,means in operable relation with said latches and said segment gear ofthe latch carrying door whereby said latches are retracted upon theinitial opening movement of said segment, and means for operating saidsegments in unison after said segment of the latch carrying door engagesits pinion;

3. In a device of the character described, the combination with astandard, a cam member movably mounted on said standard, a lever pivotedon said standard and having a cam surface engageable with said cam, anda spring engaging said standard and camfor normally retaining said camin its upper position.

4. In a device of the character described, the combination with a door,a'standard, a cam member movably mounted on said standard, a leverpivoted on said standard and having a cam surface engageable with saidcam, and a spring engaging said standard and said cam for normallyretaining said cam in its upper position, and connections between saidlever and said door whereby` saidL door is opened when said-cam isldepressed. Y

5., In a device of the character described, the combination with ay doorframe, of a pair of doors hingedly mounted therein, a pinion mounted oneach door, a segment gear mounted for pivotal movement on each side ofsaid door frame and adapted to mesh with respective pinions, a rockshaft having an arm on either side of said door frame, each arm havingoperable connection with its respective segment gear, and a depressibleplatform having operable connection with said rock shaft whereby saidsegment gears are operated to open said doors when said platform isdepressed.r

6. In a device of the character described,

the combination with a door frame, of doors hingedly mounted therein, apinion mounted on each door, a segment gearmounted for pivotal movementon each side of said door 'frame and adapted to mesh with respectiveAhaving a cam surface engaged with its respective cam, springs fornormally retaining said cams in their upper positions, a crank on saidrock shaft, connecting rods having respective ends pivotally mounted onsaid levers and said crank, and a .platform mounted on said cams.

7 In a device of the character described, the combination with a doorframe, of doors hingedly mounted therein, a pinion mounted on each door,a segment gear mounted for pivotal movement on each side of said doorframe and adapted to mesh with respective pinions, a rock shaft havingan arm on either side of said door frame, arms on said segment gears,pulleys mounted on respective sides of said door frame, cables trainedover -respective pulleys and having their respective ends connected torespective arms of said segment gears and arms on said rock shaft,weights having operable connection with each door and adapted tonormally retain said doors in closed position, a pair of standards, cam\members movably mounted on respective standards, a lever pivoted oneachostandard and `having-a cam surface engaged with its respective cam,springs for normally retaining said cams in their upper position, acrank on said rock shaft, connecting rods having respective endspivotally mounted on said levers and said crank, and a platform mountedon said cams.

In testimony whereof I affix my signature.

' CHARLES ALBRECHT, JR.

